From 07b509b7943e5594f3f228e5b62a49cf6a033709 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Mon, 23 Jul 2012 14:05:39 +0300 Subject: mei: revamp me client search function me client search functions returns index into me_client array according me client id or me client uuid. 1. Add common prefix for the functions mei_me_cl_<> 2. create new function mei_me_cl_by_id that wraps open coded loops scattered over the code 3. rename mei_find_me_client_index to mei_me_cl_by_uuid 4. rename mei_find_me_client_update_filext to mei_me_cl_update_filext and updates its parameter names Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/init.c | 38 +++++++++++++++++++------------------- 1 file changed, 19 insertions(+), 19 deletions(-) (limited to 'drivers/misc/mei/init.c') diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index e77f86e69fb5..58b3bf47c8eb 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -522,12 +522,12 @@ void mei_cl_init(struct mei_cl *priv, struct mei_device *dev) priv->dev = dev; } -int mei_find_me_client_index(const struct mei_device *dev, uuid_le cuuid) +int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *cuuid) { - int i, res = -1; + int i, res = -ENOENT; for (i = 0; i < dev->me_clients_num; ++i) - if (uuid_le_cmp(cuuid, + if (uuid_le_cmp(*cuuid, dev->me_clients[i].props.protocol_name) == 0) { res = i; break; @@ -538,35 +538,35 @@ int mei_find_me_client_index(const struct mei_device *dev, uuid_le cuuid) /** - * mei_find_me_client_update_filext - searches for ME client guid + * mei_me_cl_update_filext - searches for ME client guid * sets client_id in mei_file_private if found * @dev: the device structure - * @priv: private file structure to set client_id in - * @cguid: searched guid of ME client + * @cl: private file structure to set client_id in + * @cuuid: searched uuid of ME client * @client_id: id of host client to be set in file private structure * * returns ME client index */ -u8 mei_find_me_client_update_filext(struct mei_device *dev, struct mei_cl *priv, - const uuid_le *cguid, u8 client_id) +int mei_me_cl_update_filext(struct mei_device *dev, struct mei_cl *cl, + const uuid_le *cuuid, u8 host_cl_id) { int i; - if (!dev || !priv || !cguid) - return 0; + if (!dev || !cl || !cuuid) + return -EINVAL; /* check for valid client id */ - i = mei_find_me_client_index(dev, *cguid); + i = mei_me_cl_by_uuid(dev, cuuid); if (i >= 0) { - priv->me_client_id = dev->me_clients[i].client_id; - priv->state = MEI_FILE_CONNECTING; - priv->host_client_id = client_id; + cl->me_client_id = dev->me_clients[i].client_id; + cl->state = MEI_FILE_CONNECTING; + cl->host_client_id = host_cl_id; - list_add_tail(&priv->link, &dev->file_list); + list_add_tail(&cl->link, &dev->file_list); return (u8)i; } - return 0; + return -ENOENT; } /** @@ -577,16 +577,16 @@ u8 mei_find_me_client_update_filext(struct mei_device *dev, struct mei_cl *priv, */ void mei_host_init_iamthif(struct mei_device *dev) { - u8 i; + int i; unsigned char *msg_buf; mei_cl_init(&dev->iamthif_cl, dev); dev->iamthif_cl.state = MEI_FILE_DISCONNECTED; /* find ME amthi client */ - i = mei_find_me_client_update_filext(dev, &dev->iamthif_cl, + i = mei_me_cl_update_filext(dev, &dev->iamthif_cl, &mei_amthi_guid, MEI_IAMTHIF_HOST_CLIENT_ID); - if (dev->iamthif_cl.state != MEI_FILE_CONNECTING) { + if (i < 0) { dev_dbg(&dev->pdev->dev, "failed to find iamthif client.\n"); return; } -- cgit v1.2.3 From b210d7506f416e7250eb52c314e5ed08928639dd Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Tue, 7 Aug 2012 00:03:56 +0300 Subject: mei: name space for mei device state 1. add MEI_DEV_ prefix for mei device state enums 2. rename mei_state to dev_state 3. add constant to string translation for debug purposes Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/init.c | 54 +++++++++++++++++++++++++++++++++---------------- 1 file changed, 37 insertions(+), 17 deletions(-) (limited to 'drivers/misc/mei/init.c') diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 58b3bf47c8eb..cd6a7f1ff916 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -24,6 +24,25 @@ #include "interface.h" #include +const char *mei_dev_state_str(int state) +{ +#define MEI_DEV_STATE(state) case MEI_DEV_##state: return #state + switch (state) { + MEI_DEV_STATE(INITIALIZING); + MEI_DEV_STATE(INIT_CLIENTS); + MEI_DEV_STATE(ENABLED); + MEI_DEV_STATE(RESETING); + MEI_DEV_STATE(DISABLED); + MEI_DEV_STATE(RECOVERING_FROM_RESET); + MEI_DEV_STATE(POWER_DOWN); + MEI_DEV_STATE(POWER_UP); + default: + return "unkown"; + } +#undef MEI_DEV_STATE +} + + const uuid_le mei_amthi_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d, 0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c); @@ -123,7 +142,7 @@ struct mei_device *mei_device_init(struct pci_dev *pdev) mutex_init(&dev->device_lock); init_waitqueue_head(&dev->wait_recvd_msg); init_waitqueue_head(&dev->wait_stop_wd); - dev->mei_state = MEI_INITIALIZING; + dev->dev_state = MEI_DEV_INITIALIZING; dev->iamthif_state = MEI_IAMTHIF_IDLE; dev->wd_interface_reg = false; @@ -182,7 +201,7 @@ int mei_hw_init(struct mei_device *dev) } if (err <= 0 && !dev->recvd_msg) { - dev->mei_state = MEI_DISABLED; + dev->dev_state = MEI_DEV_DISABLED; dev_dbg(&dev->pdev->dev, "wait_event_interruptible_timeout failed" "on wait for ME to turn on ME_RDY.\n"); @@ -192,7 +211,7 @@ int mei_hw_init(struct mei_device *dev) if (!(((dev->host_hw_state & H_RDY) == H_RDY) && ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) { - dev->mei_state = MEI_DISABLED; + dev->dev_state = MEI_DEV_DISABLED; dev_dbg(&dev->pdev->dev, "host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n", dev->host_hw_state, dev->me_hw_state); @@ -258,15 +277,15 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) struct mei_cl_cb *cb_next = NULL; bool unexpected; - if (dev->mei_state == MEI_RECOVERING_FROM_RESET) { + if (dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) { dev->need_reset = true; return; } - unexpected = (dev->mei_state != MEI_INITIALIZING && - dev->mei_state != MEI_DISABLED && - dev->mei_state != MEI_POWER_DOWN && - dev->mei_state != MEI_POWER_UP); + unexpected = (dev->dev_state != MEI_DEV_INITIALIZING && + dev->dev_state != MEI_DEV_DISABLED && + dev->dev_state != MEI_DEV_POWER_DOWN && + dev->dev_state != MEI_DEV_POWER_UP); dev->host_hw_state = mei_hcsr_read(dev); @@ -285,10 +304,10 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) dev->need_reset = false; - if (dev->mei_state != MEI_INITIALIZING) { - if (dev->mei_state != MEI_DISABLED && - dev->mei_state != MEI_POWER_DOWN) - dev->mei_state = MEI_RESETING; + if (dev->dev_state != MEI_DEV_INITIALIZING) { + if (dev->dev_state != MEI_DEV_DISABLED && + dev->dev_state != MEI_DEV_POWER_DOWN) + dev->dev_state = MEI_DEV_RESETING; list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { @@ -322,7 +341,8 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) dev->host_hw_state, dev->me_hw_state); if (unexpected) - dev_warn(&dev->pdev->dev, "unexpected reset.\n"); + dev_warn(&dev->pdev->dev, "unexpected reset: dev_state = %s\n", + mei_dev_state_str(dev->dev_state)); /* Wake up all readings so they can be interrupted */ list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { @@ -371,7 +391,7 @@ void mei_host_start_message(struct mei_device *dev) if (mei_write_message(dev, mei_hdr, (unsigned char *)host_start_req, mei_hdr->length)) { dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n"); - dev->mei_state = MEI_RESETING; + dev->dev_state = MEI_DEV_RESETING; mei_reset(dev, 1); } dev->init_clients_state = MEI_START_MESSAGE; @@ -403,7 +423,7 @@ void mei_host_enum_clients_message(struct mei_device *dev) host_enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; if (mei_write_message(dev, mei_hdr, (unsigned char *)host_enum_req, mei_hdr->length)) { - dev->mei_state = MEI_RESETING; + dev->dev_state = MEI_DEV_RESETING; dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n"); mei_reset(dev, 1); } @@ -444,7 +464,7 @@ void mei_allocate_me_clients_storage(struct mei_device *dev) sizeof(struct mei_me_client), GFP_KERNEL); if (!clients) { dev_dbg(&dev->pdev->dev, "memory allocation for ME clients failed.\n"); - dev->mei_state = MEI_RESETING; + dev->dev_state = MEI_DEV_RESETING; mei_reset(dev, 1); return ; } @@ -490,7 +510,7 @@ int mei_host_client_properties(struct mei_device *dev) if (mei_write_message(dev, mei_header, (unsigned char *)host_cli_req, mei_header->length)) { - dev->mei_state = MEI_RESETING; + dev->dev_state = MEI_DEV_RESETING; dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n"); mei_reset(dev, 1); return -EIO; -- cgit v1.2.3 From c216fdeb2e7371554c56ba457c374cce9c77f91a Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Thu, 16 Aug 2012 19:39:43 +0300 Subject: mei: wd: decouple and revamp watchdog state machine Before ME watchdog was exported through standard watchdog interface it was closed and started together with the mei device. The major issue is that closing ME watchdog disabled also MEI device, to fix this the watchdog state machine has to be independent from MEI state machine. Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/init.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/misc/mei/init.c') diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index cd6a7f1ff916..98f1430e3e14 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -330,7 +330,6 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) dev->me_clients_num = 0; dev->rd_msg_hdr = 0; - dev->stop = false; dev->wd_pending = false; /* update the state of the registers after reset */ -- cgit v1.2.3